Target:Golden Thread

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The Golden Tread targets are manufactured by ISa, and developed by color scientist Don Williams. They are the targets of preference to be used with the FADGI guidelines. The current versions include the Device level target, and Object level targets (sizes 0.5x, 1.0x and 2.0x).

Device Level Target

This target is used widely by renowned institutions based in the USA. It is also called the FADGI 'DICE' target, and often mentioned in the FADGI guidelines. This target is versatile although the manufacturer does not recommend it for the use of making custom color profiles with, as the target does not have enough colors to cover the gamut.

Positioning in Deltae

Make sure the entire target is in view, with preferably a small edge of background around the entire target. If the target looks bad on your screen (too dark or too light), try to tune your system's settings before uploading. Also make sure the target is aligned very straight. Since 11 July 2012, the GTD detection is rotation invariant. You can position it in any angle you prefer.

Object Level Target

The Object level targets are meant to be placed near the images that are being digitized. They are used mainly for the checking of workflow consistency. There are three different sizes, 0.5x, 1.0x, and 2.0x. We currently only support 1.0x, the other vesions *might* also work, but we do not officically support them (yet).


Design Reference Values

The following reference table contains the design specifications of all the relevant patches in the Golden Thread targets. The true values of a target might differ from these values, although unlikely as the patches in this target are designed for durability and consistency.

All the values are in CIE-Lab, with a D50 daylight standard illuminant and a 2 degree observer.

# L* a* b*
1 31.12 13.24 15.07
2 65.43 18.11 18.72
3 49.87 -4.34 -22.29
4 44.26 -13.8 22.85
5 55.56 9.82 -24.49
6 70.82 -33.43 -0.35
7 63.51 34.26 59.6
8 39.92 11.81 -46.07
9 52.24 48.55 18.51
10 97.06 -0.4 1.13
11 92.02 -0.6 0.23
12 87.34 -0.75 0.21
13 82.14 -1.06 0.43
14 72.06 -1.19 0.28
15 62.15 -1.07 0.19
16 49.25 -0.16 0.01
17 38.62 -0.18 -0.04
18 28.86 0.54 0.6
19 16.19 -0.05 0.73
20 8.29 -0.81 0.19
21 3.44 -0.23 0.49
22 31.41 20.98 -19.43
23 72.46 -24.45 55.93
24 72.95 16.83 68.8
25 29.37 13.06 -49.49
26 54.91 -38.91 30.77
27 43.96 52 30.01
28 82.74 3.45 81.29
29 52.79 50.88 -12.72
30 50.87 -27.17 -29.46